Saniwa Ango Saves the World Without Breaking the Laws of Deduction

In his previous life, he was kicked out with absolutely no ambiguity. Then, at a twist before the script had run its course, he and the author stared at each other in bewilderment. Reborn just before everything began, a bespectacled office worker slammed the table, grabbed a SIG Sauer, and went after the boss alone before anyone else could.

Infiltrate? What was the point of infiltrating when both the world and his best friend had already been infiltrated out of existence? If you asked him, they should have wiped them all out from the start :)

Clearly, he wasn't the only one thinking that. Just as he was having a glorious showdown with Gide, the Book suddenly appeared and took them all out in one fell swoop. After that, things raced off in a strange direction

What, I'm leading sword tsukumogami to save another world? For real?

Guard against fire, theft, and Dazai. Sakaguchi Ango had guarded against everything except the Book causing trouble. He laughed dryly, genuinely amused by how things had turned out, and had no choice but to... keep infiltrating :(

While infiltrating:

What's this? His classmates from the police academy. Better fish them out.

What's this? Corrupted swords. Better fish them out.

What's this? Dazai's going in the water. Better fish him out... Wait, hold on, why are you here, and what are you doing here again?!

Theme: Hard work and perseverance will lead to happiness